But some folks think government was right to put taxpayers on the hook for the sloppy decisions of private companies. Here’s the key passage in USA Today’s editorial on bailouts.

Put simply, the bailouts worked. True, in some cases the government did not do a very good job with the details, and taxpayers are out $142 billion in connection with the non-TARP takeovers of housing giants Fannie Mae and Freddie Mac. But it’s time for the economic purists and the Washington cynics to admit that government can occasionally do something positive, at least when faced with a terrifying crisis.

Well, I guess I’m one of those “economic purists” and “Washington cynics,” so I’m still holding firm to the position that the bailouts were a mistake. In my “opposing view” column, I argue that the auto bailout sets a very bad precedent.

Unfortunately, the bailout craze in the United States is a worrisome sign cronyism is taking root. In the GM/Chrysler bailout, Washington intervened in the bankruptcy process and arbitrarily tilted the playing field to help politically powerful creditors at the expense of others. …This precedent makes it more difficult to feel confident that the rule of law will be respected in the future when companies get in trouble. It also means investors will be less willing to put money into weak firms. That’s not good for workers, and not good for the economy.

If I had more space (the limit was about 350 words), I also would have dismissed the silly assertion that the auto bailout was a success. Yes, GM and Chrysler are still in business, but the worst business in the world can be kept alive with sufficiently large transfusions of taxpayer funds.

The pro-bailout crowd argues that lawmakers had no choice. We had to recapitalize the financial system, they argued, to avoid another Great Depression. This is nonsense. The federal government could have used what’s known as “FDIC resolution” to take over insolvent institutions while protecting retail customers. Yes, taxpayer money still would have been involved, but shareholders, bondholders and top executives would have taken bigger losses. These relatively rich groups of people are precisely the ones who should burn their fingers when they touch hot stoves. Capitalism without bankruptcy, after all, is like religion without hell. And that’s what we got with TARP. Private profits and socialized losses are no way to operate a prosperous economy.

The part about “FDIC resolution” is critical. I’ve explained, both in a post criticizing Dick Cheney and in another post praising Paul Volcker, that policymakers didn’t face a choice of TARP vs nothing. They could have chosen the quick and simple option of giving the Federal Deposit Insurance Corporation additional authority to put insolvent banks into something akin to receivership.

Indeed, I explained in an online debate for U.S. News & World Report that the FDIC did handle the bankruptcies of both IndyMac and WaMu. And they could have used the same process for every other poorly run financial institution.

But the politicians didn’t want that approach because their rich contributors would have lost money.

I have nothing against rich people, of course, but I want them to earn money honestly.

As you can see, there’s nothing surprising or unusual on my list. Just basic microeconomic analysis.

Yet some people argue that lower tax rates don’t make a difference. And if lower tax rates don’t help an economy, then presumably there is no downside if Obama’s class-warfare tax policy is implemented.

The defining economic policy of the last decade, of course, was the Bush tax cuts. President George W. Bush and Congress, including Mr. Ryan, passed a large tax cut in 2001, sped up its implementation in 2003 and predicted that prosperity would follow. The economic growth that actually followed — indeed, the whole history of the last 20 years — offers one of the most serious challenges to modern conservatism. Bill Clinton and the elder George Bush both raised taxes in the early 1990s, and conservatives predicted disaster. Instead, the economy boomed, and incomes grew at their fastest pace since the 1960s. Then came the younger Mr. Bush, the tax cuts, the disappointing expansion and the worst downturn since the Depression. Today, Mitt Romney and Mr. Ryan are promising another cut in tax rates and again predicting that good times will follow. …Mr. Romney and Mr. Ryan would do voters a service by explaining why a cut in tax rates would work better this time than last time.

While I’ll explain below why I think he’s wrong, Leonhardt’s column is reasonably fair. He gives some space to both Glenn Hubbard and Phil Swagel, both of whom make good points.

“To me, the Bush tax cuts get too much attention,” said R. Glenn Hubbard, who helped design them as the chairman of Mr. Bush’s Council of Economic Advisers and is now a Romney adviser. “The pro-growth elements of the tax cuts were fairly modest in size,” he added, because they also included politically minded cuts like the child tax credit. Phillip L. Swagel, another former Bush aide, said that even a tax cut as large as Mr. Bush’s “doesn’t translate quickly into higher growth.” Why not? The main economic argument for tax cuts is simple enough. In the short term, they put money in people’s pockets. Longer term, people will presumably work harder if they keep more of the next dollar they earn. They will work more hours or expand their small business. This argument dominates the political debate.

I hope, by the way, that neither Hubbard nor Swagel made the Keynesian argument that tax cuts are pro-growth because “they put money in people’s pockets.” Leonhardt doesn’t directly attribute that argument to either of them, so I hope they’re only guilty of proximity to flawed thinking.

But that’s besides the point. Several people have asked my reaction to the column, so it’s time to recycle something I wrote back in February. It was about whether a nation should reform its tax system, but the arguments are the same if we replace “a flat tax” with “lower tax rates.”

…even though I’m a big advocate for better tax policy, the lesson from the Economic Freedom of the World Index…is that adopting a flat tax won’t solve a nation’s economic problems if politicians are doing the wrong thing in other areas.

There are five major policy areas, each of which counts for 20 percent of a nation’s grade.

Size of government

Regulation

Monetary Policy

Trade

Rule of Law/Property Rights

Now let’s pick Ukraine as an example. As a proponent of tax reform, I like that lawmakers have implemented a 15 percent flat tax.

But that doesn’t mean Ukraine is a role model. When looking at the mix of all policies, the country gets a very poor score from Economic Freedom of the World Index, ranking 125 out of 141 nations.

In other words, tax policy isn’t some sort of magical elixir. The “size of government” variable accounts for just one-fifth on a country’s grade, and keep in mind that this also includes key sub-variables such as the burden of government spending.

Yes, lower tax rates are better for economic performance, just as wheels matter for a car’s performance. But if a car doesn’t have an engine, transmission, steering wheel, and brakes, it’s not going to matter how nice the wheels are.

Not let’s shift from theory to reality. Here’s the historical data for the United States from Economic Freedom of the World. As you can see, overall economic policy moved in the right direction during the Clinton years and in the wrong direction during the Bush-Obama years.

To be more specific, the bad policy of higher tax rates in the 1990s was more than offset by good reforms such as lower trade barriers, a lower burden of government spending, and less regulation.

Similarly, the good policy of lower tax rates last decade was more than offset by bad developments such as a doubling of the federal budget, imposition of costly regulations, and adoption of two new health entitlements.